CN108691307B - Self-elevating drilling platform - Google Patents
Self-elevating drilling platform Download PDFInfo
- Publication number
- CN108691307B CN108691307B CN201710232814.1A CN201710232814A CN108691307B CN 108691307 B CN108691307 B CN 108691307B CN 201710232814 A CN201710232814 A CN 201710232814A CN 108691307 B CN108691307 B CN 108691307B
- Authority
- CN
- China
- Prior art keywords
- main
- eccentric
- main hull
- drilling
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 85
- 230000005484 gravity Effects 0.000 claims abstract description 14
- 238000003860 storage Methods 0.000 claims description 8
- 238000013459 approach Methods 0.000 claims description 2
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
- E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a self-elevating drilling platform, which comprises a main hull and a cantilever beam arranged on the main hull, wherein an eccentric derrick is fixedly connected to the cantilever beam, and a drilling tool is arranged in the eccentric derrick along the vertical direction and is used for extending downwards into the sea bottom to perform drilling operation; the eccentric derrick includes: a non-eccentric base frame and an eccentric frame, the eccentric frame having a center of gravity offset from the geometric center of the base frame in a direction away from the main hull; the drilling tool deviates from the geometric center position of the base frame towards the direction far away from the main ship body so as to increase the drilling operation range, thereby simplifying the drilling operation flow, shortening the drilling time course and the operation period and reducing the comprehensive operation cost.
Description
Technical Field
The invention relates to the field of ocean engineering construction, in particular to a self-elevating drilling platform suitable for oil and gas exploitation in shallow sea areas.
Background
With the continuous development of the world economy and technology, the actual demand of the human society for land and ocean energy is still vigorous day by day, and generally, mobile platforms with various structural forms and purposes are main equipment for exploration, development and utilization of ocean oil and gas resources.
The mobile platform has various structural types, and a self-elevating drilling platform, a self-elevating oil production platform, a self-elevating workover platform and a self-elevating life platform are often adopted in offshore sea areas. The drilling device of the self-elevating drilling platform is arranged on the main hull through the cantilever beam, and the cantilever beam extends or retracts relative to the main hull to realize the drilling operation and the change of the range of the drilling operation, and because the length and the moving stroke of the cantilever beam are limited, when the actual drilling operation range exceeds the maximum stroke of the cantilever beam, the drilling operation range needs to be increased through multiple times of navigation of the main hull, otherwise, the integral stability of the hull is influenced, and the self-elevating drilling platform needs to go through the following complex steps every time of navigation: the process of towing, positioning, pile (or pile lifting), prepressing, pile inserting, ship lifting, sliding cantilever beam (extending), well drilling, sliding cantilever beam (withdrawing), pile pulling (or pile inserting) and ship descending is carried out, so that the time course and the operation period are long, and the comprehensive cost of oil and gas exploitation is high.
Disclosure of Invention
In order to solve the technical problems, the invention provides a self-elevating drilling platform to solve the problems of long drilling operation time period, high mining period cost and the like.
Aiming at the technical problem, the invention provides a self-elevating drilling platform which comprises a main hull and a cantilever beam arranged on the main hull, wherein an eccentric derrick is fixedly connected to the cantilever beam, and a drilling tool is arranged in the eccentric derrick along the vertical direction and is used for extending downwards into the sea bottom to perform drilling operation; the eccentric derrick includes: a non-eccentric base frame and an eccentric frame, the eccentric frame having a center of gravity offset from the geometric center of the base frame in a direction away from the main hull; the drilling tool is deviated from the geometric center position of the base frame towards the direction far away from the main ship body so as to increase the drilling operation range.
In a preferred embodiment, the drilling tool is arranged in a vertical direction of the center of gravity of the eccentric derrick.
In a preferable scheme, the eccentric frame is in a structure with a narrow top and a wide bottom, and the bottom of the eccentric frame is connected with the top of the base frame.
In a preferred aspect, the eccentric frame includes: the ship comprises a main ship body, a first outer vertical surface and a second outer vertical surface which are arranged oppositely, wherein the first outer vertical surface is vertically arranged and is positioned on one surface far away from the main ship body, and the second outer vertical surface is gradually inclined and close to the first outer vertical surface from bottom to top.
In a preferable scheme, the main deck of the main hull is in an inclined downward structure along the longitudinal middle axis position in the left and right side directions.
In a preferred scheme, a beam arch is arranged at the position of a longitudinal middle shaft of the main deck of the main hull.
In a preferred scheme, the main ship body is of a roughly triangular box-shaped structure, and pile legs are respectively arranged at the three corner positions of the main ship body in a penetrating mode to support the main ship body; one of the pile legs is positioned at the bow part of the main ship body, and the other two pile legs are positioned at the stern part of the main ship body and are respectively arranged on the port and the starboard; the cantilever beam is positioned in the middle of the stern part of the main hull; the eccentric derrick can slide and extend along the horizontal direction towards the direction far away from the main hull along with the cantilever beam, can slide and retract towards the direction of the main hull, and can slide along with the cantilever beam towards the port and starboard directions in a positive and negative mode.
In a preferred scheme, a flat pile shoe is sleeved at the bottom end of the pile leg, and the maximum size of the flat pile shoe in the horizontal direction is larger than the diameter of the pile leg; and an annular bulkhead is arranged in the pile leg.
In the preferred scheme, a pile fixing frame is arranged on the main deck of the main hull corresponding to each pile leg; the two pile fixing frames positioned at the stern part of the main ship body are both connected with crane bases, and the crane bases and the two pile fixing frames are in an integrated structure; and the crane base is provided with hoisting equipment.
In a preferred scheme, an upper building is arranged on a main deck of the main hull and surrounds the pile legs of the bow; an emergency generator set is arranged in the area of the upper building deck.
In a preferred scheme, a cabin for placing a generator set is arranged in the main hull, the cabin is provided with a hatch cover, and the hatch cover is arranged at the position of a main deck of the main hull; the ash tank storage cabin is arranged in the main ship body.
In a preferred scheme, a forklift operation channel is arranged on a main deck of the main hull and bypasses the cantilever beam track and is communicated with the port area and the starboard area.
In a preferable scheme, a helicopter platform is arranged at the outer end of the bow part of the main hull to lift and descend a helicopter.
Compared with the prior art, the invention has the following beneficial effects: compared with a concentric derrick, the eccentric derrick enables the installation position of a drilling tool to deviate a certain distance in the direction far away from a main hull, the drilling operation range of positioning drilling at each station is greatly improved, the wellhead area is enlarged, the process of multiple times of navigation, positioning, pile (or pile lifting), prepressing, pile inserting, ship lifting, sliding cantilever beam (extending), drilling, sliding cantilever beam (withdrawing), pile pulling (or pile inserting) and ship descending is avoided, namely the drilling range can be quickly enlarged by changing the conventional method for enlarging the drilling range by means of multiple times of navigation into the same station, the drilling operation flow is simplified, the drilling time course and the operation period are shortened, and the comprehensive operation cost is reduced.
Drawings
Fig. 1 is a schematic plan view of the jack-up rig of the present embodiment.
Fig. 2 is an enlarged view of a portion a of fig. 1.
Fig. 3 is a schematic view of the structure of the main hull in the preparation step of the present embodiment.
Fig. 4 is an exploded view of the portion B of fig. 3.
The reference numerals are explained below: 2. a main hull; 21. a main deck; 3. a cantilever beam; 4. an eccentric derrick; 41. a base frame; 42. an eccentric frame; 421. a first facade; 422. a second facade; a', a geometric center; a. a center of gravity; 5. drilling tools; 61. pile legs; 62. pile legs; 63. pile legs; 601. fixing a pile frame; 602. fixing a pile frame; 603. fixing a pile frame; 64. a flat pile shoe; 71. hoisting equipment; 72. hoisting equipment; 73. hoisting equipment; 701. a crane base; 81. building the upper layer; 82. a helicopter platform; 911. a hatch cover; 92. an ash can storage compartment; w, a forklift operation channel; 201. a towing rope is moved in a navigation way; 202. an anchor machine; 203. and (4) an anchor frame.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1 to 4, the self-elevating drilling platform provided by the embodiment belongs to mobile oil and gas exploitation drilling equipment, and is suitable for working water with a depth of 106.7 meters, a variable load of 3000 tons to 5000 tons, a drilling depth of about 10000 meters, a working environment with a wave height of 15 meters, a wave period of 15 seconds, a wind speed of 51 meters/second and a flow speed of 0.5 meters/second.
The jack-up rig includes: a main hull 2 and a cantilever beam 3. The main hull 2 comprises a bow, a midship and a stern. The cantilever beam 3 sets up on 2 stern portion intermediate positions of main hull, and the cantilever beam 3 can slide along the horizontal direction and stretch out towards the direction of keeping away from main hull 2 to can slide towards main hull 2 direction and withdraw, and cantilever beam 3 can also be along the port and the plus-minus 2.5 meters that slide of starboard direction of main hull 2.
With reference to fig. 2 and 4, an eccentric derrick 4 is fixedly connected to the cantilever beam 3, and the length, width and height thereof are 35 × 32 × 160 feet. A drilling tool 5 is arranged in the eccentric derrick 4 along the vertical direction. Wherein the eccentric derrick 4 includes: a non-eccentric base frame 41 and an eccentric frame 42, the eccentric frame 42 having a centre of gravity which is offset from the geometric centre a' of the base frame 41 in a direction away from the main hull 2. The drilling tool 5 is displaced from the position of the geometrical centre a' of the base frame 41 in a direction away from the main hull 2 to increase the drilling operation range.
Further, the drilling tool 5 is disposed in the vertical direction of the center of gravity a of the eccentric derrick 4.
Referring to fig. 3 and 4, a scribe line P is divided into a base frame 41 and an eccentric frame 42. The base frame 41 and the eccentric frame 42 are connected with each other in the vertical direction, the bottom of the base frame 41 is fixedly connected with the cantilever beam 3, and the bottom of the eccentric frame 42 is connected with the top of the base frame 41.
In the present embodiment, the base frame 41 has a rectangular frame structure, and the geometric center a' of the base frame 41 is located at the center of the transverse cross section of the base frame 41.
The eccentric frame 42 is in a frame structure with a narrow top and a wide bottom, and is in an eccentric structure; that is, the eccentric frame 42 is asymmetric in structure from the side of the platform. Accordingly, the eccentric frame 42 of the present embodiment includes: the first outer vertical surface 421, the second outer vertical surface 422 and two third outer vertical surfaces (not shown in the figure), wherein the first outer vertical surface 421 and the second outer vertical surface 422 are arranged oppositely, the first outer vertical surface 421 is vertically arranged and is positioned on one surface far away from the main hull 2, the second outer vertical surface 422 gradually inclines and approaches to the first outer vertical surface 421 from bottom to top, and the two third outer vertical surfaces are respectively positioned on the two sides of the port and the starboard of the main hull 2.
Since the base frame 41 and the eccentric frame 42 are of an integral frame structure, and the eccentric frame 42 lacks a part of the structure with respect to the base frame 41, the center of gravity a of the eccentric derrick 4 as a whole is deviated away from the position lacking the part of the structure, that is, in a direction away from the main hull 2. For stability of installation of the drilling tool 5, it is preferably installed at the position of the center of gravity a of the eccentric derrick 4, that is, the installation position of the drilling tool 5 is deviated in a direction away from the main hull 2, so that the stroke of the drilling tool 5 is increased during drilling.
In actual drilling operations, the drilling tool 5 has a lateral stroke distance (port-starboard direction) and a longitudinal stroke distance (main hull 2 axial direction) so that it performs multi-borehole drilling operations in this range. The drilling tool 5 of the embodiment has a transverse stroke distance of L0, and when the cantilever beam 3 slides to a maximum distance in a direction away from the main hull 2 under the original sliding stroke condition, the longitudinal stroke of the drilling tool 5 includes: the distance L1, which is the distance from the initial position of the drilling operation to the geometric center a' of the base frame 41, when the drilling tool 5 can perform the drilling operation, is: s = L1 × L0; since the drilling tool 5 of the eccentric derrick 4 of the present application is disposed offset from the geometric center a 'of the base frame 41, i.e., the distance L' between the geometric center a 'of the base frame 41 and the center of gravity a of the eccentric derrick 4, the drilling tool 5 can perform drilling operation within a range Δ, i.e., Δ = L'. L0, without changing the maximum stroke of the outrigger 3. That is, the maximum range of the actual drilling operation of the drilling tool 5 is S + Δ, and the drilling operation in a wide range at the same station position is realized.
In other embodiments, the eccentric derrick 4 may also be of other structures, as long as the center of gravity a of the eccentric derrick 4 is shifted away from the main hull 2, such as: the second outer elevation 422 of the eccentric frame 42 is erected and offset away from the main hull 2 so that the eccentric derrick 4 as a whole is L-shaped from the side.
The main deck 21 of the main hull 2 is of an inclined downward structure towards the left and right sides along the longitudinal central axis position thereof, so that the main deck 21 is of an approximately arched structure, the height difference between the central area of the weather main deck 21 and the port and starboard areas is increased, the problem of water accumulation in the weather main deck 21 area is effectively avoided, the water flow direction on the surface of the main deck 21 is controlled, and operators can conveniently reach different working areas in rainy days. Preferably, a beam arch with a width of 400mm is arranged at the position of the longitudinal middle axis of the main deck 21, so as to conveniently manufacture the inclined main deck 21.
The main hull 2 of the present embodiment is substantially a triangular box-like structure to provide buoyancy and to ensure sailing stability in the towing situation. The main hull 2 has a total length of about 70 m, a profile width of about 63 m and a profile depth of about 8 m. The three corners of the main hull 2 are respectively provided with a pile leg 61, 62 and 63 with a truss structure for supporting the main hull 2, the length of the pile leg 61, 62 and 63 is about 150 meters, the mud penetration depth is 6 meters, the distance between the pile leg 61 and the pile leg 62 and the distance between the pile leg 63 are 39 meters, and the distance between the pile leg 62 and the pile leg 63 are 44 meters. The spud leg 61 is located at the bow of the main hull 2, and the other two spud legs 62, 63 are located at the stern of the main hull 2 and are arranged on the port and starboard sides.
The main deck 21 of the main hull 2 corresponding to the legs 61, 62, 63 is provided with pilings 601, 602, 603 for fixing the legs.
The bottom end of each leg 61, 62, 63 is sleeved with a flat shoe 64, the maximum size of which in the horizontal direction is about 16 meters, so that the weight of the empty ship, variable load and environmental load can be transmitted to the seabed through the flat shoe 64. The flat shoe 64 includes: the main ship body 2 is characterized by comprising two conical body structures with the tip parts roughly cut off, wherein the large head end of one conical body is butted with the large head end of the other conical body, and in a use state, the small head end of one conical body faces upwards, and the small head end of the other conical body faces downwards, so that the flat pile shoe 64 can be inserted into the seabed to transmit vertical force and horizontal force borne by the pile legs 61, 62 and 63 to the seabed foundation, and the adaptability of the main ship body 2 to marine environment load is improved; the maximum horizontal dimension of the flat shoe 64 is much larger than the diameters of the legs 61, 62, 63, and the support surface area is increased while the support surface pressure is reduced. Meanwhile, the requirement on the soil quality of the seabed when the self-elevating drilling platform is in a standing position can be correspondingly reduced, and the working performance of the platform is improved.
Preferably, annular bulkheads are arranged in the pile legs 61, 62 and 63, so that the integral supporting strength of the flat pile shoe 64 is increased, the thickness of a bottom plate and a top plate of the flat pile shoe 64 can be reduced, the cost is reduced on one hand, and the weight of the flat pile shoe 64 is also reduced on the other hand; in addition, a manhole (not shown) of the flat shoe 64 is provided in a non-high stress area to secure the strength performance of the flat shoe 64.
In this embodiment, three lifting devices 71, 72, 73, three crane bases and a superstructure 81 are further provided on the main deck 21 of the main hull 2.
Typically, the lifting device is fixedly connected to the main deck via a crane base. However, in the present embodiment, three crane bases are provided on the pile fixing frames 601, 602, and 603, respectively, and as shown in fig. 3, the crane base 701 is provided on the pile fixing frame 601, and the hoisting device 71 is provided on the crane base 701. Similarly, the other two crane bases are correspondingly disposed on the pile fixing frames 602 and 603, and the hoisting devices 72 and 73 are correspondingly disposed on the two crane bases. The hoisting equipment 71 is positioned on the main deck 21 on the port and close to the bow, and can hoist the midship, the bow and the corresponding port and starboard areas; in addition, the two hoisting devices 72 and 73 are positioned at the stern and are respectively arranged on the main deck 21 at the port and starboard positions, so that the hoisting operation can be carried out on the midship region and the stern region, most regions of the main hull 2, which are exposed to the air, of the main deck 21 are covered, the operation space of operators is effectively increased, and the working efficiency of the operators is improved. In order to arrange the main deck 21 compactly and effectively utilize the space, two hoisting devices 72 and 73 at the stern are arranged on the pile fixing frames 602 and 603; correspondingly, the crane base of the hoisting equipment 72 and the pile fixing frame 602 are of an integrated structure, and the crane base of the hoisting equipment 73 and the pile fixing frame 603 are of an integrated structure, so that the space of the main deck 21 is effectively saved, and the height of the crane base is properly reduced.
The superstructure 81 is arranged around the spud legs 61 of the bow, the deck area of the superstructure 81 is provided with an emergency generator set, and the superstructure 81 is internally provided with a living area, an entertainment area and the like. The emergency generator set region provides emergency power for important electrical equipment on the platform, and the living region can be about 130 workers living, working and doing auxiliary work in the region.
Further, a helicopter platform 82 is arranged at the outer end of the bow of the main hull 2 and at the top of the superstructure 81, so that the helicopter can take off and land, and the supply, rescue and traffic capacity of the platform are improved.
A cabin and ash can storage compartment 92 is provided within the main hull 2.
The nacelle is used to house a generator set and has a large-sized hatch 911, and the hatch 911 is provided at the main deck 21 of the main hull 2. The length of the hatch cover 911 of the embodiment is 2500mm-3000mm, the width is 2000mm-25000mm, the hatch cover 911 is positioned at the top of the engine room and the hatch cover 911 forms a part of the main deck 21 of the main hull 2, when the generator set needs to be maintained and integrally disassembled and assembled, the hatch cover 911 can be opened on the main deck 21 to directly hoist the generator set, the problem that the main hull 2 needs to be cut in the prior art is avoided, the structural integrity of the main hull 2 is protected, the maintenance cost is reduced, the use cost and the maintenance cost are reduced, and the working efficiency of operators is improved.
A dust tank storage compartment 92 is provided in the main hull 2 to house a dust tank, which is provided near the bow. Compared with the conventional position where the ash can is installed on the main deck 21, the embodiment is designed to be placed in a sunken position, and eight ash cans are arranged and installed in the ash can storage compartment 92 below the main deck 21 of the main hull 2, thereby increasing the working space and the storage support area for operators on the weather main deck 21. In addition, for the drilling platform, a large amount of drilling materials (such as barite, soil powder, cement and the like) need to be carried during operation, the total weight of the drilling platform is often more than 800 tons, and after the eight ash tanks are respectively arranged in the storage cabin below the main deck 21 of the box-type main ship body 2, the height of the gravity center of the drilling platform is greatly reduced (compared with the situation that the eight ash tanks are arranged on the surface of the open-air main deck 21), so that the overall gravity center of the self-elevating drilling platform can be reduced, and the stability of the drilling platform is improved.
Through the reasonable arrangement on the main deck 21 of the main hull 2, the main deck 21 has more operation spaces, and on the basis, the forklift operation channel W for communicating the port area and the starboard area is further arranged. Specifically, one end of the forklift working channel W extends from the port lifting device 72 in the fore direction, crosses the main deck 21 at the midship position to reach the starboard area, that is, bypasses the cantilever beam 3 rail to reach the starboard area, and then continues to extend in the aft direction to reach the vicinity of the starboard lifting device 73; further, forklift work lanes W leading to the superstructure 81 are provided at positions corresponding to the port and starboard positions in the forklift work lanes W crossing the main deck 21. This fork truck operation passageway W makes in the regional handling operation blind area of open-air main deck 21, just can transport the assigned position of port and starboard to the goods through driving fork truck, need not to rely on the manpower to accomplish and remove the goods.
Further, a towing rope 201, an anchor machine 202 and an anchor frame 203 are arranged at the bow of the main hull 2. The towing mooring rope 201 for the mobile towing is an emergency towing system, can meet the requirements of relevant sea area operation, and can rapidly start the emergency towing system when the main towing fails, thereby ensuring normal towing. The anchor 202 and the anchor frame 203 are used to lift and lay down the tie-down anchor.
The cantilever beam of the self-elevating drilling platform is provided with the eccentric derrick, the eccentric derrick enables the installation position of a drilling tool to deviate a certain distance in the direction far away from the main hull, compared with the existing concentric derrick, the drilling operation range of positioning drilling at each station of the self-elevating drilling platform is greatly improved, the wellhead area is enlarged, the process of multiple times of navigation, positioning, pile (or pile lifting), prepressing, pile inserting, ship lifting, sliding cantilever beam (extending), drilling, sliding cantilever beam (withdrawing), pile (or pile inserting) and ship descending is avoided, namely the drilling range can be rapidly increased by changing the conventional method for increasing the drilling range by multiple times of navigation into the same station, thereby simplifying the drilling operation process, shortening the drilling time history and the operation period, the comprehensive operation cost is reduced.
The self-elevating drilling platform not only reduces the cost of oil extraction in offshore oil fields and the construction of marine enterprises, but also optimizes the drilling operation process.
While the present invention has been described with reference to the above exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (11)
1. A self-elevating drilling platform comprises a main hull and a cantilever beam arranged on the main hull, and is characterized in that an eccentric derrick is fixedly connected to the cantilever beam, and a drilling tool is arranged in the eccentric derrick along the vertical direction and used for extending downwards into the sea bottom to perform drilling operation;
the eccentric derrick includes: a non-eccentric base frame and an eccentric frame, the eccentric frame having a center of gravity offset from the geometric center of the base frame in a direction away from the main hull; the eccentric frame is of a structure with a narrow upper part and a wide lower part, and the bottom of the eccentric frame is connected with the top of the base frame; the eccentric frame includes: the ship comprises a main ship body, a first outer vertical surface and a second outer vertical surface which are oppositely arranged, wherein the first outer vertical surface is vertically arranged and is positioned on one surface far away from the main ship body, and the second outer vertical surface gradually inclines and approaches to the first outer vertical surface from bottom to top;
the drilling tool is deviated from the geometric center position of the base frame towards the direction far away from the main ship body so as to increase the drilling operation range.
2. The jack-up rig according to claim 1, wherein said boring tool is disposed in a vertical direction of a center of gravity of said eccentric derrick.
3. The jack-up rig of claim 1, wherein the main hull main deck is in an inclined downward configuration in a left-right direction at its longitudinal center axis location.
4. The jack-up rig according to claim 3, wherein a beam arch is provided at a longitudinal center axis of the main hull main deck.
5. The jack-up rig according to claim 1, wherein the main hull is a substantially triangular box-type structure with legs inserted at three angular positions thereof to support the main hull, respectively; one of the pile legs is positioned at the bow part of the main ship body, and the other two pile legs are positioned at the stern part of the main ship body and are respectively arranged on the port and the starboard;
the cantilever beam is positioned in the middle of the stern part of the main hull; the eccentric derrick can slide and extend along the horizontal direction towards the direction far away from the main hull along with the cantilever beam, can slide and retract towards the direction of the main hull, and can slide along with the cantilever beam towards the port and starboard directions in a positive and negative mode.
6. The jack-up rig according to claim 5, wherein the bottom end of the leg is sleeved with a flat shoe having a maximum horizontal dimension greater than the diameter of the leg; and an annular bulkhead is arranged in the pile leg.
7. The jack-up rig of claim 5, wherein a pile-securing frame is provided on the main hull main deck for each leg; the two pile fixing frames positioned at the stern part of the main ship body are both connected with crane bases, and the crane bases and the two pile fixing frames are in an integrated structure; and the crane base is provided with hoisting equipment.
8. The jack-up rig according to claim 5, wherein a superstructure is provided on a main deck of the main hull, the superstructure being disposed around the legs of a bow; an emergency generator set is arranged in the area of the upper building deck.
9. The jack-up rig according to claim 1, wherein a nacelle for housing a generator set is provided in the main hull, the nacelle having a hatch cover and the hatch cover being provided at a main deck position of the main hull; the ash tank storage cabin is arranged in the main ship body.
10. The jack-up rig of claim 1, wherein the main hull has a forklift access passage on a main deck that bypasses the outrigger track and communicates between the port and starboard areas.
11. The jack-up rig according to claim 1, wherein a helicopter platform is provided at the outer end of the bow of the main hull for helicopter takeoff and landing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710232814.1A CN108691307B (en) | 2017-04-11 | 2017-04-11 | Self-elevating drilling platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710232814.1A CN108691307B (en) | 2017-04-11 | 2017-04-11 | Self-elevating drilling platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108691307A CN108691307A (en) | 2018-10-23 |
| CN108691307B true CN108691307B (en) | 2021-03-02 |
Family
ID=63842491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710232814.1A Active CN108691307B (en) | 2017-04-11 | 2017-04-11 | Self-elevating drilling platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108691307B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915040B (en) * | 2019-01-17 | 2021-06-15 | 中国船舶及海洋工程设计研究院（中国船舶工业集团公司第七0八研究所） | Riser tensioner sliding system and using method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203007918U (en) * | 2012-11-09 | 2013-06-19 | 大连船舶重工集团有限公司 | Self-lifting type drilling platform based on truss-type stake legs |
| CN104541016A (en) * | 2012-04-17 | 2015-04-22 | 国民油井华高有限合伙公司 | Mobile drilling rig with telescoping substructure boxes |
| CN204589969U (en) * | 2015-04-28 | 2015-08-26 | 大连船舶重工集团有限公司 | Be applicable to the small modular jack-up unit of greater coasting area operation |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6034645B2 (en) * | 1980-03-13 | 1985-08-09 | 川崎重工業株式会社 | Equalizing device for rack and pinion lifting equipment |
| CN202023182U (en) * | 2011-01-04 | 2011-11-02 | 广西电力工业勘察设计研究院 | Waterborne drilling foam platform |
| CN103158838B (en) * | 2013-03-18 | 2016-03-30 | 中集海洋工程研究院有限公司 | The split drilling ship of a kind of rapid-assembling and fractionation and manufacture method |
-
2017
- 2017-04-11 CN CN201710232814.1A patent/CN108691307B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104541016A (en) * | 2012-04-17 | 2015-04-22 | 国民油井华高有限合伙公司 | Mobile drilling rig with telescoping substructure boxes |
| CN203007918U (en) * | 2012-11-09 | 2013-06-19 | 大连船舶重工集团有限公司 | Self-lifting type drilling platform based on truss-type stake legs |
| CN204589969U (en) * | 2015-04-28 | 2015-08-26 | 大连船舶重工集团有限公司 | Be applicable to the small modular jack-up unit of greater coasting area operation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108691307A (en) | 2018-10-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107542101B (en) | Construction method of offshore four-buoy-buoyancy tank combined foundation structure | |
| US7815398B2 (en) | Methods of positioning an elevating support vessel | |
| US20080237175A1 (en) | Extension assemblies and methods thereof | |
| US20080247827A1 (en) | Work-over rig assembly and methods thereof | |
| US20080237170A1 (en) | Extension Bridges and methods of tender assist | |
| CN109629568A (en) | The process for sinking of the steady stake platform of offshore wind farm jacket foundation steel pipe pile floating | |
| US20080243365A1 (en) | Methods of holding station and mooring and elevating support vessel | |
| CN102442409A (en) | Deck ascent and descent type worktable ship and construction method of shore wind power generation facility using the same | |
| US20080237174A1 (en) | Crane support apparatus and methods thereof | |
| GB2491259A (en) | Mobile barge with extendable legs and independently movable platform | |
| CN102409650A (en) | Method for mounting shallow water ocean jacket platform | |
| JP2020075535A (en) | Construction method of offshore structure and work pontoon | |
| CN115180101B (en) | Underwater local dry land overhauling method and system | |
| CN108691307B (en) | Self-elevating drilling platform | |
| CN105648996A (en) | Lifting ballasting barge applicable to installation of simple wellhead platform and mounting method thereof | |
| TWI834746B (en) | Work platform vessel equipped with crane and method of using the crane | |
| CN109208538B (en) | Offshore pile-driving and pile-leaning mooring construction process | |
| CN104018481B (en) | A kind of bucket foundation list leg post production platform | |
| CN115704209A (en) | Shallow water area offshore platform installation method | |
| US20120082530A1 (en) | System and method for submerging a hydraulic turbine engine | |
| CN220433648U (en) | Multifunctional pile stabilizing platform | |
| JP3162131U (en) | Water structure | |
| US20220355907A1 (en) | Systems and methods for a rack structure for a transport vessel adapted for use with an offshore self-elevating vessel | |
| US9469384B2 (en) | Variable stable drilling barge for shallow water service (inland and offshore) | |
| CN114837185A (en) | Light guide frame and mounting method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |